Fluid-pressure riveting-machine.



E. E. HANNA, P. W. GATES, CONSERVATOR.

FLUID PRESSURE RIVETING MACHINE.

APPLICATION FILED JUNE 15, 1909.

Patented May 2, 1911.

a sums-sum 1.

m M M m I E. E. HANNA, P. W. GATES, GONSERVATOR.

FLUID PRESSURE RIVETING MACHINE.

APPLICATION FILED JUNE15, 1909.

Patented May 2, 1911.

3 SHEETS SHEET 2.-

E. E. HANNA, P. W. GATES, CONSBRVATOR.

' FLUID PRESSURE RIVETING MACHINE.

APPLICATION IILED' JUNE 15, 11909.

991,440. Patented May 2, 1911.

3 SHEETS-SHEET 3.

Harare/0422i:

UNITED sT 'rEs .FfF O IcE. 1

ELMER ELSWORTH HANNA, OFTEVANSTON, ILLINOIS; rinnri'rus w. earns,

- GONSERVATOR. I, j

'rLum-mssunn swarms-Macrame.

' siding at Evanston, in the county of Cook and ate of Illinois, hasinvented certain new and useful Improvements in Fluid-PressureRiveting-Machines, of which the fol lowing isa specification.

The invention relates in general to riveting machines, and moreparticularly to fluid pressure riveting machines of the type covered byUnited States Letters Patent Nos. 823,273 and 823,274 granted -on JuneIn riveting machines of the type referred to, the dies are permitted toseparate a sufficient distance to admit of the insertion of the materialto be riveted, and during the riveting action the dies move toward eachother with gradually increasing pressure until the desired -maximumpressure has been reached, after which the dies continue to move towardeach other with substantially the attained maximum degree of pres sure.Thev distance through which the dies move toward each other at uniformmaximum pressure is such that the machine when once adjusted for a givenlength of rivet and thickness of late will require no further adjustmentor ordinary variations-in the lengths of the rivets, sizes of the holes,or thicknesses of the plates.

The object of the present invention is togrovide a riveting machine ofthe type above I escribed, which will be simple in jconstruc tion,efiicient in operation and durable-in use. The invention will be morefully described hereinafter with reference to the accompanying drawings,in which the same is illustrated as embodied in a convenient andpractical form, and in which- Fi ure 1 is an elevational View showingthe d es separated; Fig, 2, aview similar to Fig. 1, showin i the esmoved together; Fig. 3, an end e evational view' looking from the rightin Fig. 2; Fig. 4, anenlarged sectional detail; and Fig. 5, a detailview of the lever F.

Specification 01' Letters Patent. Application filed June 15, 1909.Serial Ho. 502,402.

Patented M a, 1911.

designate the same parts 'in the several figures of the drawings;

' The same reference characters are used to Reference letter A indicatesthe supporting frame, to which is connected in any suitable manner a diea of any desiredsize and shape. A die 6 which cooperates with the die ais carried inany suitable manner by means of a frame B relativelymovable with respect to the su porting frame A. The frame B is preferaby made in the form of a bell crank lever and is provided with arms B, Bspaced apart to straddle the frame A. The supporting frame -A andmovable frame Bare pivotally connected as indicated at C. The frame B isprovided with ears I), 6 between which is pivotally secured the lowerend of alink D, which forms one member of a pair of toggle links. Theuppermember of the' pair of toggle links is pivot-ally sup orted at itsupper end between arms A, X wardly from and are preferably formedintegrally with the supporting frame A. The

, upper member of the pair of toggle links consists of a pair of linksE, Espaced apart at their upper ends by a collar 6; 'A pivot rod Eextends through bearings a, .a' in the upper ends of the arms A, A ofthe frame A, and through the interposed u per ends of the links E, E andthe mterme 'ate collar e.

F indicatesthe main operating lever, one' which project upend of whichprojects between the lower.-

ends of. the pairof links E, E. Alined circular trunnions F on the'opposite'sides of the main lever F extend. within circular openingsinthe lower ends of the links E, E.

The upper end of the lower link D of the pair of toggle links" isprovided with a reduced. ontion d which extends into an opening 7 ormedin theflmainvoperating lever F, as clearly, shown in Fig.4. The reducedupper end d of the lower link'D is pivotal y connected within the socketf in the operating lever eccentrically to the axis of rotation of thetrunnions F of the lever F relatively to the upper links E, E. The'socket f is located within the recess in the main operating leveragainst which the upguide links G being 'the supportin frame cate in acylinder K. I

per .end d of the lower toggle link D engages.

A pair of guide links G arepivotally connected .to the main operatinglever F inter mediate of its ends, the other ends of the pivotallyconnected to The end 0 the main operating lever F oppositeto its pivotalconnections with the toggle links is pivotally connected to the outerend of a pistonrod it through the medium of the piston rod head 71. Thepiston rod extends into and is pivotally connected with a piston Hmounted to recipro- K indicates the cylinder head and M a valve casingin which is incloseda suitable valve L for controlling the supply andexhaust of fluid pressure to the opposite sides of the piston H.

N, N indicate bail rods for supporting the riveting machine, the lowerends of such the piston H to .fluid pressure which moves other with agradually increasing pressure,

the piston within the cylinder K. The movement ofthe piston throughapproximately;

the; first .half of its stroke serves, through the medium of the pistonrod h, main operating lever F, and guide links G, to straighten thetoggle links D and E until their center lines are substantiallyparallel, thereby oscil-.

lating the frame B relatively to the frame A and causing the dies tomove toward each and at a gradually decreasing speed.. The

movement of the dies toward each other then continues at substantiallyuniform maximum v pressure and with substantially uniform speedduringthe movement of the piston /through approximately'the last half ofits stroke. 'The toggling action practically ceases after the .movementof the piston through the: first half of its stroke, at which time themovement of the-diestoward each other has attained amaximum pressure,and

. the continued movement of the dies toward each otherat such maximumpressure during the'movement of the piston through the I last half ofits stroke is due to the separation of the upper and lower members ofthe toggle links, by reason of their eccentric connection with theoperating lever, that is, by reason of the axis of the pivotalconnection between the end .d' of the. link D and the lever F beinglocated eccentrically of the axis of the trunnions F of the lever F.

' toggle linksa It will be observed that by my improved rlvctmg machinethe maximum workmg'or riveting pressure 15 continuous for a considerable'distance,"so that when the parts words, thedistance of travel of thedies at a maximum pressure is sufficient to compensate for inequalitiesin the material being riveted thereby rendering the machine usefulwithout subsequent ad ustment for rivet= ing different thicknesses ofmaterial. The gradual increasing pressure and decreasing speed duringthefirst half of the movement of the piston serves to upset the end ofthe rivet, while the continued maximum pressure completely closes'theheads upon the plates or material, forcing the same together andcompleting the final union thereof.

' I claim:

1. In a riveting machine, the combination with a pair of dles, of meansfor relatively moving said dies toward and away from 'each other,comprising toggle links, an operating lever to which areeccentricallypivotally connected the adjacent ends of the a guide link pivotallyconnected to sai lever, and means for applying power to said lever;

2. .In a riveting machine, the combination with a pair of dies, ofmeansfor relatively moving. said'dies toward and away from each other,comprising toggle links, an operating lever to one end of which areeccentrically pivotally connected the adjacent ends of said togglelings, means for apply: ing power to the other end of said lever, and

means for guiding said lever during its .movement by said power means.

3. In a riveting machine, thecombination' with a main frame, of asupplemental frame pivotally connected to the main frame, opposing dieson said frames, tog le links interposed between said main an su'plemental frames, a fluid pressure cylindgr rigidly mounted upon saidmain frame, a reclprocarting piston in said cylinder, a lever to one endoftwhich are eccentrically ivotallyconnected the adjacent ends of saidtoggle links and to the other end of which said piston is operativelyconnected, and a uide link pivotally connected to said lever mtermednate its ends and to said main frame. 7

v 4. In a machine of the character described,

the combination with a main member, 'of a supplemental member pivotallyconnected to themain member, a pair of linkspivotally supported bybrackets on the main member,

' Y axis of the trunnions thereon, a guide link I ivotally connected tosaid lever, andmeans a lever extending between and haying trunnionsengaging bearings in said links a link, pivotally connected at one endtosaid supplementalmember and pivotally connected 5 at its other end vtosaid lever eccentric of the or applying power tosaid lever.

In testimony whereof, I have subscribed v I my name.

' PHILETUS W. GATES, Conservator for Elmer Elswo'rth Witnesses:-

Gno. L. WILKINSON,

ANNIE C. GoUR'rnNAY;

